I do think that the hair could use a little work though. It seems like you tried maybe a little too hard to paint every single strand. Honestly that's hard NOT to do since we all know that your do is made up of thousands of strands. Really when rendering it, aside from a few stray strands if you're trying to be realistic you should maybe take a chunkier approach to shading it. (I suck at explaining things I'm sorry if that's confusing!)